Data/hora: 29/06/2024 11:08:19

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	19/09/2016	
Data da última atualização: 	19/09/2016	
Autoria: 	OLIVEIRA, R. A.; BRUNETTO, G.; LOSS, A.; GATIBONI, L. C.; KURTZ, C.; MÜLLER JÚNIOR, V.; LOVATO, P. E.; OLIVEIRA, B. S.; SOUZA, M.; COMIN, J. J.	
Título: 	Cover Crops Effects on Soil Chemical Properties and Onion Yield.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 40, n. , p. 1-17, 2016.	
Idioma: 	Inglês	
Conteúdo: 	Cover crops contribute to nutrient cycling and may improve soil chemical
properties and, consequently, increase crop yield. The aim of this study was to evaluate
cover crop residue decomposition and nutrient release, and the effects of these plants
on soil chemical properties and on onion (Allium cepa L.) yield in a no-tillage system.
The experiment was carried out in an Inceptisol in southern Brazil, where cover crops
were sown in April 2012 and 2013. In July 2013, shoots of weeds (WD), black oats
(BO), rye (RY), oilseed radish (RD), oilseed radish + black oats (RD + BO), and oilseed
radish + rye (RD + RY) were cut at ground level and part of these material from each
treatment was placed in litter bags. The litter bags were distributed on the soil surface
and were collected at 0, 30, 45, 60, 75, and 90 days after distribution (DAD). The residues
in the litter bags were dried, weighed, and ground, and then analyzed to quantify lignin,
cellulose, non-structural biomass, total organic carbon (TOC), N, P, K, Ca, and Mg. In
November 2012 and 2013, onion crops were harvested to quantify yield, and bulbs were
classified according to diameter, and the number of rotted and flowering bulbs was
determined. Soil in the 0.00-0.10 m layer was collected for chemical analysis before
transplanting and after harvesting onion in December 2012 and 2013. The rye plant
residues presented the highest half-life and they released less nutrients until 90 DAD.
The great permanence of rye residue was considered a protection to soil surface, the
opposite was observed with spontaneous vegetation. The cultivation and addition of dry
residue of cover crops increased the onion yield at 2.5 Mg ha-1.	
Palavras-Chave: 	Allium cepa; no-till system; nutrient cycling.	
Categoria do assunto: 	A Sistemas de Cultivo	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_38322.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (100533-1) - UPC - AP - DD -  -  -  - DIS